Winston wants his motherfucking money.

And who's Winston, you might ask? He's a promoter who said Young M.A took $33,000 of performance money from him without performing.

Based on his account, the 'OUUU' spitter had a horrible attitude from the very beginning, and she was very difficult to work with.

"Young M.A came to the club," he said. "She said the club wasn't packed enough ... We paid her the full amount ... She said she talked to someone else, and they told her not to come ... Young M.A had a nasty attitude the whole God damn time. It took me three weeks to get the drop from Young M.A."

Additionally, Winston posted videos with his crew flashing guns. "My hood [is] pissed off M.A," he yelled.

By the way it looks, the promoter is also a rapper, and he's now trying to use this situation to further his rap career by making diss songs against the 24-year-old.

As for Young M.A ... she's blaming it all on an Uber mix up.

Update: Winston delivered that diss track: